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beta-Chloroprene

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Synonyms & Trade Names
Chlorobutadiene, 2-Chloro-1,3-butadiene, Chloroprene
CAS No.
126-99-8
RTECS No.
EI9625000
DOT ID & Guide
1991 131P(inhibited)
Formula
CH₂=CClCH=CH₂
Conversion
1 ppm = 3.62 mg/m3
IDLH
Ca [300 ppm]
See: 126998
Exposure Limits
NIOSH REL
Ca C 1 ppm (3.6 mg/m3) [15-minute] See Appendix A
OSHA PEL
TWA 25 ppm (90 mg/m3) [skin] See Appendix G
Measurement Methods
NIOSH 1002;
OSHA 112
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a pungent, ether-like odor.
Molecular Weight
88.5
Boiling Point
139°F
Freezing Point
-153°F
Solubility
Slight
Vapor Pressure
188 mmHg
Ionization Potential
8.79 eV
Specific Gravity
0.96
Flash Point
-4°F
Upper Explosive Limit
11.3%
Lower Explosive Limit
1.9%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Peroxides & other oxidizers [Note: Polymerizes at room temperature unless inhibited with antioxidants.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; anxiety, irritability; dermatitis; alopecia; reproductive effects; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system, reproductive system
Cancer Site
[lung & skin cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet (flammable)
Change:No recommendation
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0133   MEDICAL TESTS: 0050
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health